US20110086551A1 - Electronic device and connector - Google Patents

Electronic device and connector Download PDF

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Publication number
US20110086551A1
US20110086551A1 US12967859 US96785910A US2011086551A1 US 20110086551 A1 US20110086551 A1 US 20110086551A1 US 12967859 US12967859 US 12967859 US 96785910 A US96785910 A US 96785910A US 2011086551 A1 US2011086551 A1 US 2011086551A1
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Prior art keywords
contact
contacts
connector
power
electronic device
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US8078776B2 (en )
Inventor
Donald J. Novotney
John Benjamin Filson
David Tupman
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Apple Inc
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Apple Inc
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R27/00Coupling parts adapted for co-operation with two or more dissimilar counterparts
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02Control of operating function, e.g. switching from recording to reproducing
    • G11B19/027Remotely controlled
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R31/00Coupling parts supported only by co-operation with counterpart
    • H01R31/06Intermediate parts for linking two coupling parts, e.g. adapter
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00-H01R33/00
    • H01R13/64Means for preventing incorrect coupling
    • H01R13/645Means for preventing incorrect coupling by exchangeable elements on case or base
    • H01R13/6456Means for preventing incorrect coupling by exchangeable elements on case or base comprising keying elements at different positions along the periphery of the connector
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R2105/00Three poles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R24/00Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/58Contacts spaced along longitudinal axis of engagement

Abstract

A connector interface system for a communication device is disclosed. The interface includes a docking connector. The docking connector includes first make/last break contacts that minimize internal damage to the internal electronics. The docking connector also includes specific keying arrangement to prevent noncompliant connectors from being plugged in, and thereby minimizes potential damage to the multi-communication device. The connector interface system also includes a remote connector which provides for the ability to output audio, input audio, provides I/O serial protocol, and to provide an output video. Embodiments of the present invention allow for a standard headphone cable to be plugged in but also for special remote control cables, microphone cables, video cables could be utilized in such a system. The connector interface system also includes a serial protocol to control device features. These controls help a user sort and search for data more efficiently within the device.

Description

    CROSS-REFERENCES TO RELATED APPLICATIONS
  • The present application claims priority from and is a continuation of U.S. Non-Provisional Application No. 12/210,022, Sep. 12, 2008; which is a continuation of U.S. Non-Provisional Application No. 10/833,689, Apr. 27, 2004. The entire contents of each are incorporated herein by reference for all purposes.
  • The contents of the following related applications are herein incorporated by reference in their entirety for all purposes:
  • (1) U.S. application Ser. No. 12/209,962, now U.S. Pat. No. 7,660,929, issued Feb. 9, 2010, entitled “CONNECTOR INTERFACE SYSTEM FOR A MULTI-COMMUNICATION DEVICE” and filed concurrently with the present application;
  • (2) U.S. application Ser. No. 12/209,970, now U.S. Pat. No. 7,587,540, issued Sep. 8, 2009, entitled “TECHNIQUES FOR TRANSFERRING STATUS INFORMATION BETWEEN AN ACCESSORY AND A MULTI-COMMUNICATION DEVICE” and filed concurrently with the present application; and
  • (3) U.S. application Ser. No. 12/209,993, now U.S. Pat. No. 7,702,833, issued Apr. 20, 2010, entitled “TECHNIQUES FOR TRANSFERRING INFORMATION BETWEEN AN ACCESSORY AND A MULTI-COMMUNICATION DEVICE” and filed concurrently with the present application.
  • FIELD OF THE INVENTION
  • The present invention relates generally to multi-communication devices and more particularly to a connector interface system for such devices.
  • BACKGROUND OF THE INVENTION
  • Multi-communication devices are utilized in a variety of environments. What is meant by a multi-communication device is a device such as MP3 player, or other type of device that receives video, audio, and a variety of other digital data and can provide an output of the data. As these devices proliferate, a connector interface specification becomes more important, and also insuring that a particular multi-communications device interfaces appropriately with the appropriate external devices becomes more important.
  • In a typical connector interface, there is a docking connector that allows for the docking of the multi-communications device to a docking station for another type of communication for the device. A multi-communication device also typically includes a remote connector with the ability to output audio. As more multi-media content becomes available (i.e., digital video graphics, etc.) it is desirable to have a multi-media device which can effectively input and output such data.
  • Finally, such an interface typically has some sort of protocol to control device features from an external device and it also is desirable for the protocol to help the user sort and search for data faster and in an efficient manner. Heretofore, there is no device that includes features that overcome many of the above-stated problems. What is desired is a connector interface system which is utilized in such a device to address all the above-identified issues. The present invention addresses such a need.
  • SUMMARY OF THE INVENTION
  • A connector interface system for a communication device is disclosed. The interface includes a docking connector. The docking connector includes first make/last break contacts that minimize internal damage to the internal electronics. The docking connector also includes specific keying arrangement to prevent noncompliant connectors from being plugged in, and thereby minimizes potential damage to the multi-communication device. The connector interface system also includes a remote connector which provides for the ability to output audio, input audio, and output video using an I/O serial protocol. Heretofore, all these features have not been implemented in a connector. Therefore, this would allow for a standard headphone cable to be plugged in but also for special remote control cables, microphone cables, video cables to be utilized in such a system. The connector interface system also includes a serial protocol to control device features. These controls help a user sort and search for data more efficiently within the device.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIGS. 1A and 1B illustrate a docking connector in accordance with the present invention.
  • FIGS. 2A-2C illustrate the remote connector in accordance with the present invention.
  • FIG. 3A illustrates the connection pin designations for the docking connector.
  • FIG. 3B illustrates the connection pin designations for the remote connector.
  • FIG. 4A illustrates the Firewire connector interface.
  • FIG. 4B illustrates the USB connector interface.
  • FIG. 4C illustrates a reference schematic diagram for accessory detect and identify system for detecting and identifying accessories for the docking connector.
  • FIG. 4D is a reference schematic of an electret microphone that is within the remote connector.
  • DETAILED DESCRIPTION
  • The present invention relates generally to multi-communication devices and more particularly to a connector interface system for such devices. The following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements. Various modifications to the preferred embodiment and the generic principles and features described herein will be readily apparent to those skilled in the art. Thus, the present invention is not intended to be limited to the embodiment shown but is to be accorded the widest scope consistent with the principles and features described herein.
  • Connector System Overview
  • To describe the features of the connector system in accordance with the present invention in more detail, refer now to the following description in conjunction with the accompanying drawings.
  • Docking Connector
  • FIGS. 1A and 1B illustrate a docking connector 100 in accordance with the present invention. Referring first to FIG. 1A, the keying features 102 are of a custom length 104. In addition, a specific key arrangement where one set of keys are separated by one length are at the bottom and another set of keys are separated by another length at the top of the connector is used. The use of this key arrangement prevents noncompliant connectors from being plugged in and causing potential damage to the device. The connector for power utilizes a Firewire specification for power. The connector includes a first make/last break contact to implement this scheme. FIG. 1B illustrates the first make/last break contact 202 and also illustrates a ground pin and a power pin related to providing an appropriate first mate/last break contact. In this example, the ground pin 204 is longer than the power pin 206. Therefore, the ground pin 204 would contact its mating pin in the docking accessory before the power pin 206. Therefore internal electrical damage of the electronics of the device is minimized.
  • In addition, a connector interface system in accordance with the present invention uses both USB and Firewire interfaces as part of the same docking connector alignment, thereby making the design more compatible with different types of interfaces, as will be discussed in detail hereinafter. In so doing, more remote systems and devices can interface with the multi-communication device.
  • Remote Connector
  • The connection interface system also includes a remote connector which provides for the ability to output audio, input audio, and output video using an I/O serial protocol. FIG. 2A is a front and top view of a remote connector 200 in accordance with the present invention. As is seen, the remote connector 200 includes a top headphone receptacle 202, as well as, a second receptacle 204 for remote devices. FIG. 2B illustrates a plug 300 to be utilized in the remote connector. The plug 300 allows the features to be provided via the remote connector. FIG. 2C illustrates the plug 300 inserted into the remote connector 200. Heretofore, all these features have not been implemented in a remote connector. Therefore, a standard headphone cable can be plugged in but also special remote control cables, microphone cables, video cables could be utilized with the remote connector.
  • Serial Protocol
  • The connector interface system also includes a serial protocol. The protocol is utilized to allow external devices to control the multi-communication device. These controls help a user sort and display for data more efficiently utilizing the device. A representation list of controls includes, but are not limited to:
  • Next album
  • Previous album
  • Next chapter
  • Previous chapter
  • Next play list
  • Previous play list
  • Shuffle setting advance
  • Repeat setting advance
  • Backlight for 30 seconds
  • Begin fast forward
  • Begin rewind
  • To describe the features of the connector interface system in more detail, please find below a functional description of the docking connector, remote connector and a serial protocol in accordance with the present invention.
  • Docking and Remote Connector Specifications
  • For an example of the connector pin designations for both the docking connector and for the remote connector for a multi-communication device such as an iPod device by Apple Inc., refer now to FIGS. 3A and 3B. FIG. 3A illustrates the connector pin designations for the docking connector. FIG. 3B illustrates the connection pin designations for the remote connector.
  • Docking Connector Specifications
  • FIG. 4A illustrates a typical FireWire connector interface for the docking connector:
  • FireWire Power:
      • a) 8V-30V DC IN
      • b) 10W Max
  • FireWire:
      • a) Designed to IEEE 1394 A Spec (400 Mb/s)
  • FIG. 4B illustrates the USB connector interface.
  • USB 2.0:
      • a) Designed to USB 2.0 High Speed Spec
      • b) The USB Power (pin 8 on the 30-pin connector) is not used for powering device; only used to detect a USB host connection.
  • FIG. 4C illustrates a reference schematic diagram for accessory detect and identify system for detecting and identifying accessories for the docking connector. The system comprises:
      • a) A simple resistor to ground allows the device to determine what has been plugged into docking connector. There is an internal pullup on Accessory Identify.
      • b) Two pins required (Accessory Identify & Accessory Detect)
  • Serial Protocol Communication:
      • a) Two pins are used to communicate to and from device (Rx & Tx)
      • b) Input & Output (0V=Low; 3.3V=High)
      • c) A device with an identity resistor (ID #13) is a serial dock accessory.
  • A device coupled to the docking connector allows for a standard serial protocol to be utilized. Attaching a serial dock accessory makes any top-attached (remote connector) accessories inactive.
  • Line Level Input (Left & Right):
      • a) Stereo audio input b) Input Level 1V RMS (max)
      • a) Chassis ground is tied to specified pins
      • b) Digital ground should not be tied to Audio Return
    Remote Connector Specifications
  • Audio Out:
      • a) Stereo Output per channel volume controlled by device
  • Mono Mic In:
      • a) Mono mic in through Left channel
      • b) Filtered electret power supplied by internal device
  • FIG. 4D is a reference schematic of an electret microphone that is within the remote connector.
  • Serial Protocol Communication:
      • a) Two pins used to communicate to and from device (Rx & Tx)
      • b) Input & Output (0V=Low, 3.3V=High)
    Serial Protocol Protocol Generalities
  • As previously mentioned, another feature of the present invention is the use of a serial protocol for allowing features to be implemented for remote devices. In a preferred embodiment, the protocol builds upon a signaling protocol, such as the RS-232 serial specification. However, the signaling levels are nonstandard. In true RS-232, a mark is −7V and a space is 7V. In this protocol, a mark is 3.3V and a space is 1V. The signaling rate for this protocol is 19,200 bps. All signaling is at 8 bits data, no parity and one stop bit (8-N-1).
  • This protocol is to be used in both directions of a link. Every device is encouraged to implement both sending and receiving capabilities. It is be possible to determine the direction (host to device or device to host) of a packet from its contents only. This means that no packet is valid for sending from both the host and device.
  • All devices must be able to handle variable-length packets. For example, even though an identify packet currently has no defined data, a device must be able to understand an identify packet with data and should respond to the best of its ability. It must at least not lose sync to the packet signaling.
  • Lingo Specifications
  • Lingo ID
    General 0x00
    Microphone 0x01
    Simple Remote 0x02
    Display Remote 0x03
    RF transmitter 0x05
  • The general lingo is shared for housekeeping commands across all devices. The microphone lingo is used by the remote connector on the multi-communication device. The simple remote lingo is used by a standard in-line remote control. The display remote lingo is reserved for a device with similar functionality to the standard remote but with a display for status.
  • General Lingo Specification
  • Command ID Data Length
    Request identify 0x00 0x00
    Identify 0x01 0x01+
  • The host may send a request identify to the device to ask the device to reidentify itself.
  • The device sends an identify packet to identify itself. At this time multifunction (combo) devices are not supported. The identify data payload is thus the command ID ×01 followed by a single byte of the same value as the lingo specification of the functionality the device implements unless specified otherwise. The identify packet returned in response to a request identify packet does not need to have the extra sync bytes and delays used during the startup process.
  • Simple Remote Lingo Specification
  • Command ID Data Length
    Buttons status 0x00 0x00+
  • A simple remote device sends a buttons status command to indicate an updated status of which buttons are held down. The data of the packet is a number of bytes indicating which buttons are currently held down. The bytes are made up by ORing the masks of the buttons together. The device will send a 0×00 in data (or no data) to indicate all buttons are released. While any buttons are held down the device should repeat this packet on a predetermined interval. If no packet of this sort is received by the host for 200 ms the host may assume a packet was lost and go to “all buttons up” mode.
  • A representative simple remote button map is shown below:
  • Simple Remote Button Map
  • Button Number Byte No, Mask
    Play/Pause 0 0, 0x01
    Volume Up 1 0, 0x02
    Volume Down 2 0, 0x04
    Next Track 3 0, 0x08
    Previous Track 4 0, 0x10
    Next Album 5 0, 0x20
    Previous Album 6 0, 0x40
    Stop 7 0, 0x80
    Play/Resume 8 1, 0x01
    Pause 9 1, 0x02
    Mute toggle 10 1, 0x04
    Next Chapter 11 1, 0x08
    Previous Chapter 12 1, 0x10
    Next Playlist 13 1, 0x20
    Previous Playlist 14 1, 0x40
    Shuffle setting advance 15 1, 0x80
    Repeat setting advance 16 2, 0x01
    Power On 17 2, 0x02
    Power Off 18 2, 0x04
    Backlight for 30 seconds 19 2, 0x08
    Begin FF 20 2, 0x10
    Begin REW 22 2, 0x20
  • The use of the button remote map allows for features that heretofore have not been utilized in multi-communication devices such as an iPod device manufactured by Apple Inc.
  • A connector interface system for a communication device is disclosed. The interface includes a docking connector. The docking connector includes first make/last break contacts that minimize internal damage to the internal electronics. The docking connector also includes specific keying arrangement to prevent noncompliant connectors from being plugged in, and thereby minimizes potential damage to the multi-communication device. The remote connector provides for the ability to output audio, input audio, and output video using an I/O serial protocol. The connector interface also includes a serial protocol to control device features. These controls help a user sort and search for data more efficiently within the device.
  • Although the present invention has been described in accordance with the embodiments shown, one of ordinary skill in the art will readily recognize that there could be variations to the embodiments and those variations would be within the spirit and scope of the present invention. Accordingly, many modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the appended claims.

Claims (25)

  1. 1. An electronic device having an electronic connector, the electronic connector comprising:
    a keying arrangement having first and second sets of keys, the first set of keys being spaced apart by a first length and the second set of keys being spaced apart by a second length different than the first length; and
    a plurality of contacts including first, second and third ground contacts, first and second power contacts, an accessory power contact, a USB power contact, a plurality of USB signal contacts and left and right audio out contacts;
    wherein when the electronic connector mates with a corresponding second connector associated with an accessory device, at least one of the contacts is active and the first, second and third ground contacts make contact with ground contacts in the second connector before the accessory power contact makes contact with an accessory power contact in the second connector.
  2. 2. The electronic device set forth in claim 1 wherein the plurality of contacts consists of thirty contacts in sequentially numbered contact locations, and wherein the first, second and third ground contacts are at contact locations 2, 16 and 29, respectively.
  3. 3. The electronic device set forth in claim 1 wherein the electronic connector further comprises an accessory detect contact.
  4. 4. The electronic device set forth in claim 1 wherein the plurality of USB signal contacts include a USB D+ signal contact and a second USB D− signal contact.
  5. 5. The electronic device set forth in claim 4 wherein another digital signal contact is positioned between the USB D+ and USB D− signal contacts.
  6. 6. The electronic device set forth in claim 5 wherein the another digital signal contact is a Firewire signal contact.
  7. 7. The electronic device set forth in claim 5 wherein the plurality of contacts consists of thirty contacts in sequentially numbered contact locations, and wherein the first, second and third ground contacts are at contact locations 2, 16 and 29, respectively.
  8. 8. The electronic device set forth in claim 7 further comprising fourth, fifth and sixth ground contacts.
  9. 9. The electronic device set forth in claim 8 wherein when the electronic connector mates with a corresponding second connector associated with an accessory device, the fourth, fifth and sixth ground contacts make contact with ground contacts in the second connector before the accessory power contact makes contact with an accessory power contact in the second connector.
  10. 10. The electronic device of claim 8 wherein the accessory power contact provides power out at a first power level and the first and second power input contacts receive power in at a second power level that is higher than the first power level.
  11. 11. The electronic device of claim 10 wherein the first power level is 3.3 volts.
  12. 12. The electronic device set forth in claim 10 wherein the electronic connector further comprises a contact at location 20 that can be used to detect if an accessory is connected to the electronic connector.
  13. 13. The electronic device of claim 1 wherein the accessory power contact provides power out at a first power level and the first and second power input contacts receive a power in at a second power level that is higher than the first power level.
  14. 14. The electronic device of claim 13 wherein the first power level is 3.3 volts.
  15. 15. The electronic device set forth in claim 14 further comprising fourth, fifth and sixth ground contacts.
  16. 16. The electronic device set forth in claim 1 wherein the electronic connector further comprises first and second serial communication contacts for transmitting and receiving digital signals with an accessory device using a serial protocol.
  17. 17. The electronic device set forth in claim 16 wherein the electronic connector further comprises an accessory identify contact.
  18. 18. The electronic device set forth in claim 17 wherein the electronic connector further comprises a resistor coupled between the accessory identify contact and ground.
  19. 19. The electronic device set forth in claim 16 wherein the plurality of contacts comprise thirty contacts in sequentially numbered contact positions, and wherein the first ground contact is at contact location 2, the third ground contact is at contact location 29, and the second ground contact is between the first and third ground contacts.
  20. 20. The electronic device set forth in claim 19 wherein the electronic connector further comprises left and right audio in contacts.
  21. 21. An electronic device having an electronic connector, the electronic connector comprising:
    a keying arrangement having first and second sets of keys, the first set of keys arranged at a top of the connector and spaced apart by a first length and the second set of keys arranged at a bottom of the connector and spaced apart by a second length different than the first length; and
    a plurality of contacts including first, second and third ground contacts, first and second power contacts, an accessory power contact, a USB power contact, a plurality of USB signal contacts and left and right audio out contacts;
    wherein the accessory power contact provides power out at a first power level and the first and second power input contacts receive a power in at a second power level that is higher than the first power level; and
    wherein the ground contacts are longer than the accessory power contact so that when the electronic connector mates with a corresponding second connector associated with an accessory device, the ground contacts make contact with ground contacts in the second connector before the accessory power contact makes contact with an accessory power contact in the second connector.
  22. 22. The electronic device set forth in claim 21 wherein the plurality of contacts comprises thirty contacts in sequentially numbered contact positions, and wherein the first and third ground contacts are at contact locations 2 and 29 and the second ground contact is between the first and third ground contacts.
  23. 23. The electronic device set forth in claim 22 wherein the plurality of USB signal contacts includes a USB D+ signal contact and a second USB D− signal contact and wherein another digital signal contact is positioned between the USB D+ and USB D− signal contacts.
  24. 24. The electronic device of claim 23 wherein the first power level is 3.3 volts.
  25. 25. The electronic device of claim 24 wherein the plurality of contacts further includes fourth, fifth and sixth ground contacts.
US12967859 2004-04-27 2010-12-14 Electronic device having a dual key connector Active US8078776B2 (en)

Priority Applications (3)

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US10833689 US7441062B2 (en) 2004-04-27 2004-04-27 Connector interface system for enabling data communication with a multi-communication device
US12210022 US7853746B2 (en) 2004-04-27 2008-09-12 Interface system for enabling data communication between a multi-communication device and other devices
US12967859 US8078776B2 (en) 2004-04-27 2010-12-14 Electronic device having a dual key connector

Applications Claiming Priority (2)

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US12967859 US8078776B2 (en) 2004-04-27 2010-12-14 Electronic device having a dual key connector
US13288876 US8271705B2 (en) 2004-04-27 2011-11-03 Dual key electronic connector

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US12210022 Continuation US7853746B2 (en) 2004-04-27 2008-09-12 Interface system for enabling data communication between a multi-communication device and other devices

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US13288876 Continuation US8271705B2 (en) 2004-04-27 2011-11-03 Dual key electronic connector

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US20110086551A1 true true US20110086551A1 (en) 2011-04-14
US8078776B2 US8078776B2 (en) 2011-12-13

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US10833689 Active 2025-05-18 US7441062B2 (en) 2004-04-27 2004-04-27 Connector interface system for enabling data communication with a multi-communication device
US11476262 Active US7305506B1 (en) 2004-04-27 2006-06-27 Method and system for transferring status information between a media player and an accessory
US11839263 Active US7590783B2 (en) 2004-04-27 2007-08-15 Method and system for transferring status information between a media player and an accessory
US12209962 Active US7660929B2 (en) 2004-04-27 2008-09-12 Connector interface system for a multi-communication device
US12209970 Active US7587540B2 (en) 2004-04-27 2008-09-12 Techniques for transferring status information between an accessory and a multi-communication device
US12209993 Active US7702833B2 (en) 2004-04-27 2008-09-12 Techniques for transferring information between an accessory and a multi-communication device
US12210022 Active 2024-08-16 US7853746B2 (en) 2004-04-27 2008-09-12 Interface system for enabling data communication between a multi-communication device and other devices
US12534416 Active US7757026B2 (en) 2004-04-27 2009-08-03 Techniques for transferring status information between an accessory and a multi-communication device
US12537751 Active 2024-12-15 US8135891B2 (en) 2004-04-27 2009-08-07 Method and system for transferring button status information between a media player and an accessory
US12967859 Active US8078776B2 (en) 2004-04-27 2010-12-14 Electronic device having a dual key connector
US13288876 Active US8271705B2 (en) 2004-04-27 2011-11-03 Dual key electronic connector
US13366203 Active US8402187B2 (en) 2004-04-27 2012-02-03 Method and system for transferring button status information between a media player and an accessory

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US10833689 Active 2025-05-18 US7441062B2 (en) 2004-04-27 2004-04-27 Connector interface system for enabling data communication with a multi-communication device
US11476262 Active US7305506B1 (en) 2004-04-27 2006-06-27 Method and system for transferring status information between a media player and an accessory
US11839263 Active US7590783B2 (en) 2004-04-27 2007-08-15 Method and system for transferring status information between a media player and an accessory
US12209962 Active US7660929B2 (en) 2004-04-27 2008-09-12 Connector interface system for a multi-communication device
US12209970 Active US7587540B2 (en) 2004-04-27 2008-09-12 Techniques for transferring status information between an accessory and a multi-communication device
US12209993 Active US7702833B2 (en) 2004-04-27 2008-09-12 Techniques for transferring information between an accessory and a multi-communication device
US12210022 Active 2024-08-16 US7853746B2 (en) 2004-04-27 2008-09-12 Interface system for enabling data communication between a multi-communication device and other devices
US12534416 Active US7757026B2 (en) 2004-04-27 2009-08-03 Techniques for transferring status information between an accessory and a multi-communication device
US12537751 Active 2024-12-15 US8135891B2 (en) 2004-04-27 2009-08-07 Method and system for transferring button status information between a media player and an accessory

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US13366203 Active US8402187B2 (en) 2004-04-27 2012-02-03 Method and system for transferring button status information between a media player and an accessory

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